Derailment-guard.



No. 883,107. PATENTED MAR. 24, 1908. F. GEHRIGKE.

DERAILMENT GUARD.

APPLICATION FILED SEPT. 7, 1906.

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UNITED STATES PATENT oEEIcE.

FRIEDRICH GEHRIOKE, OF BERLIN, GERMANY, ASSIGNOR OF ONE-HALF TOFRIEDRICH BOLLMANN, OF BERLIN, GERMANY.

DERAILMENT-GUARD.

Specification of Letters Patent.

Patented March 24, 1908.

Application filed September 7, 1906. Serial No. 333,626.

To all whom it may concern:

Be it known that I, FRIEDRICH GEHRICKE, citizen of Germany, residing atBerlin, 111.4 Ritterstrasse, Germany, have invented. certain new anduseful Improvements in Derailment-Guards; and I do hereby declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains tomake and use the same.

This invention relates to appliances for supporting railway vehicles onthe rails when the wheels are derailed and comprising a transverse baror rail adapted to come in contact with and slide along the track railswhen the wheels leave the rails.

According to this invention the transverse slide rail is normally heldabove the track rails out of contact therewith by rods pivoted to theframe of the vehicle in such manner that it can swing about the pivotsand is also connected with the vehicle by adjusting rods by which meansit can besupported in a higher or lower position relatively to thetrack.

If the rods which regulate the height of the bar'or rail are directlyconnected with the frame of the vehicle the bar must be variouslyadjusted with respect to its distance from the track, because the slideor skidding bar is intended to lie at all times as closely as possibleabove the track, the vehicle how ever altering the distance of the bar,according to the extent to which it is loaded, for the more heavily thevehicle is loaded the more will the body of the vehicle and therewithalso the slide bar be lowered, and vice versa, so that the rods whichregulate the height of the slide bar must be correspondingly shortenedor lengthened. The adjustment every time of the slide bar with respectto its distance from the track is however superfluous, when inconsequence of the special nature of their suspension, the rods which.regulate that distance are no longer affected by the al teration in theload of the vehicle. For this purpose these rods may, for example, beconnected with one end of a lever suspended. in the manner of the beamof a vehicle to the axle, so that the free end of the lever is pressedupwards against the frame of the vehicle. Consequently when the load isincreased, this free end is lowered with the frame of the vehicle theother end, however, and there- With the slide bar being pulled upwards.By

specially determined measurement of the lever arms this movement of theslide bar, which is dependent on the change in the load of the vehicle,can of course be reduced to a practically inappreciable minimum, so thatthe slide bar is practically always at the same distance from the track.Or the rods which regulate the height of the slide bar may be connectedwith a lever fixed to the axle, and which as the axle and consequentlyalso this lever is not affected by the change in the loading of thevehicleholds the slide bar at all times at the same distance from thetrack, Whatever the load of the vehicle may be.

In the accompanying drawing two forms of the invention are illustratedFigure 1 bein a side elevation of a part of a vehicle fitted with anappliance in accordance with this invention. Fig. 2 is a front elevationof the same. Fig. 3 a plan, the body of the vehicle being removed. Fig.4 illustrates the manner in which the slide bar is always firmly held atthe same height above the track by a lever firmly arranged on the axlebox.

The slide bar a is furnished with the downwardly directed projections band c and fixed to the beams 76. The projections b c prevent thecarriage from runnin entirely off the rails. The beams 76 are he dtogether by the connecting bar Z, which is firmly held by theoscillating links n. Finally the links a are pivoted on the pins 0,which are secured to the frame of the vehicle by a clip or the like. Theslide bar a can thus. swing up and down easily and be adjusted to anydesired height above the track. In order that this adjust ment may bemade independent of the alteration in the load of the vehicle whichfrequently occurs I support on the axle p a pivot bolt Q on which adouble arm lever r can easily turn. To the one end of this lever thechains 3 which hold the slide bar up are fixed, so that the free end ofthe lever 1' is drawn up and pressed against the pin 0. When the load ofthe vehicle is increased, the frame or body of the vehicle is lowered,and therewith the pin 0 and also the free end of the lever r, while theother end raises the slide rail a. The levers r are connected togetherby means of the transverse rods to, in order that they may not movesidewise. The nearer the pivot q of the lever r the chain 8 is suspendedthe less is the movement which is effected by the slide bar a in conseuence of the alteration of the load'of the vdllicle. However, theincreased loading of the vehicle cannot cause the slide bar a to slideon the track, as it is removed farther from the track as the load isincreased.

The oblique suspension of the chain 8 on the beam 1' can be prevented byplacin on the carriage framein Fig. 1 abovethe p ace of connectionbetween the chain 3 and lever ra second pivot pin and on this a secondbeam like lever. The chain 8 must be fixed to this second lever exactlyabove the safety bar a, shortly in front of its pivot, and the other andconsiderably longer end of the lever be linked to the lever r shortly infront of its pivot q. The movement of the lever r arising from the loadof the vehicle is then transmitted in a very slight degree to the beamlike lever, and this small movement is communicated in a still furtherreduced de gree to the chain 8 and the slide rail a, the

ast 1rliamed practically having no movement at a By means of the deviceillustrated in Fig. 4 the adjustment of the height of the slide barindependently of the continuous slight alterations in the load of thevehicle can be effected more simply than with such beam like levers. Tothe aXle the one arm lever z is fixed and to the free end of this theslide rail a with the assistance of chains 8 or the like. As the axledoes not follow the change in the load of the vehicle, the slide baralways remains adjusted at the same height above the track.

It is of no essential importance as regards the invention how the leversr and e are constructed. The chains 8 can of course be lengthened orshortened at any time by means of the sleeve nut 15 or the like.

I-Iavin thus fully described my invention, what I c aim is 1. In aderailment guard for railway vehicles, the combination of a slide bar,means to oscillatingly support said slide bar on the vehicle, and meansto adjust its distance from the track.

2. In a derailment guard for railway vehicles, the combination of aslide bar, means to oscillatingly support said slide bar on the vehicle,rods regulating the distance of the guard from the track, and means toconnect said rods to a part of the vehicle not affected by the change ofthe load.

3. In a derailment guard for railway vehicles, the combination of aslide bar, means to oscillatingly support said slide bar on the vehicle,a bearing, a lever, means to connect one end of said lever to the rodscarrying the guard, the free end of the lever pressing against the frameof the vehicle, and means to lower the free end and raise the oppositeend of the lever to which the guard is suspended by the load of thevehicle.

4. In a derailment guard for railway vehi cles, the combination of aslide bar, means to oscillatingly support said slide bar on the vehicle,a bearing, a pivoted lever, and means to suspend the guard nearer to thepivot of the lever than the distance between the said pivot and the oneof the frames of the vehicle.

5. In a derailment guard for railway vehicles, the combination of aslide bar, means to oscillatingly support said slide bar on the vehicle,a bearing, a double armed lever, a second horizontally placed lever,means to connect the same with the shorter arm of the double armedlever, means to suspend the slide bar on the shorter arm of said secondlever, and means to connect its longer arm with the shorter one of thedouble armed lever, said means being adapted to reduce to a minimum theinfluence of the changes in the load of the vehicle.

6. In a derailment guard for railway vehicles, the combination of aslide bar, means to oscillatingly mount said slide bar on the vehicle,an arm fixed to the bearing rovided for the wheels of the vehicle or theike, and means to connect the slide bar with the free end of said livedarm.

In testimony whereof I hereunto afliX my signature in the presence oftwo witnesses.

FRIEDRICH GEHRIOKE.

' lVitnesses:

WoLnEMAn HAUPT, HENRY HAsPER.

